Does a Car Exhaust Pipe Have a Drain Hole?

[DelAlex]

Car exhaust pipes do have drain holes, as water accumulation in the exhaust pipe can easily cause oxidation of the pipe and muffler, leading to corrosion. The maintenance methods for exhaust pipes include: 1. Preventing water from entering the interior of the exhaust pipe; 2. Applying rust-proof oil inside the exhaust pipe; 3. Regularly inspecting the condition of the exhaust pipe. The functions of an exhaust pipe are: 1. Reducing environmental pollution: The exhaust pipe contains a purification device, with a three-way catalytic converter that effectively cleans harmful gases from the exhaust; 2. Ventilation and exhaust: The car exhaust pipe operates in a cycle of intake, compression, power, and exhaust—without it, the car would not function; 3. Noise reduction: The exhaust pipe is equipped with a muffler, which reduces car noise by using multiple channels to divert airflow, causing friction and collisions between the diverted flows to gradually decrease airflow speed, thereby lowering noise through repeated cycles.